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Influence of Altitude on Ozone Levels and Variability in the Lower Troposphere: a Ground-based Study for Western Europe Over the Period 2001–2004 : Volume 7, Issue 1 (29/01/2007)

By Chevalier, A.

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Book Id: WPLBN0003997727
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File Size: Pages 30
Reproduction Date: 2015

Title: Influence of Altitude on Ozone Levels and Variability in the Lower Troposphere: a Ground-based Study for Western Europe Over the Period 2001–2004 : Volume 7, Issue 1 (29/01/2007)  
Author: Chevalier, A.
Volume: Vol. 7, Issue 1
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Delmas, R., Gheusi, F., Nez, C. O., Zbinden, R., Chevalier, A., Thouret, V.,...Athier, G. (2007). Influence of Altitude on Ozone Levels and Variability in the Lower Troposphere: a Ground-based Study for Western Europe Over the Period 2001–2004 : Volume 7, Issue 1 (29/01/2007). Retrieved from

Description: Laboratoire d'Aérologie, Toulouse, France. The PAES (French acronym for synoptic scale atmospheric pollution) network focuses on the chemical composition (ozone, CO, NOx/y and aerosols) of the lower troposphere (0–3000 m). Its high-altitude surface stations located in different mountainous areas in France complete the low-altitude rural MERA stations (the French contribution to the european program EMEP, European Monitoring and Evaluation Program). They are representative of pollution at the scale of the French territory because they are away from any major source of pollution.

This study deals with ozone observations between 2001 and 2004 at 11 stations from PAES and MERA, in addition to 16 elevated stations located in mountainous areas of Switzerland, Germany, Austria, Italy and Spain. The set of stations covers a range of altitudes between 115 and 3550 m. The comparison between recent ozone mixing ratios with those of the last decade found in the literature for two high-elevation sites (Pic du Midi, 2877 m and Jungfraujoch, 3580 m) leads to a trend that has slowed down compared to old trends but remains positive. This could be attribuable to the reduction of ozone precursors at European scale, that however do not compensate an ozone increase at the global scale. Averaged levels of ozone increase with elevation in good agreement with data provided by the airborne observation system MOZAIC (Measurement of OZone and water vapour by Airbus In-service airCraft), showing a highly stratified ozone field in the lower troposphere, with a transition at about 1000 m asl between a sharp gradient (30 ppb/km) below but a gentler gradient (3 ppb/km) above. Ozone variability also reveals a clear transition between boundary-layer and free-tropospheric regimes at the same altitude. Below, diurnal photochemistry accounts for about the third of the variability in summer, but less than 20% above – and at all levels in winter – where ozone variability is mostly due to day-to-day changes (linked to weather conditions or synoptic transport). Monthly-mean ozone mixing-ratios show at all levels a minimum in winter and the classical summer broad maximum in spring and summer – which is actually the superposition of the tropospheric spring maximum (April–May) and regional pollution episodes linked to persistent anticyclonic conditions that may occur from June to September. To complement this classical result it is shown that summer maxima are associated with considerably more variability than the spring maximum. This ensemble of findings support the relevance of mountain station networks such as PAES for the long-term observation of free-tropospheric ozone over Europe.

Influence of altitude on ozone levels and variability in the lower troposphere: a ground-based study for western Europe over the period 2001–2004

Bonasoni, P., Stohl, A., Cristofanelli, P., Calzolari, F., Colombo, T., and Evangelisti, F.: Background ozone variations at Mt. Cimone Station, Atmos. Environ., 34, 5183–5189, 2000.; Brönnimann, S., Schuepbach, E., Zanis, P., Buchmann, B., and Wanner, H.: A climatology of regional background ozone at different elevations in Switzerland (1992–1998), Atmos. Environ., 34(29–30), 5191–5198, 2000.; Brönnimann, S., Buchmann, B., and Wanner, H.: Trends in near-surface ozone concentrations in Switzerland: the 1990s, Atmos. Environ., 36(17), 2841–2852, 2002.; Brunekreef, B. and Holgate, S.: Air pollution and health, Lancet, 360(9341), 1233–1242, 2002.; Carslaw, D.: On the changing seasonal cycles and trends of ozone at Mace Head, Ireland, Atmos. Chem. Phys., 5, 3441–3450, 2005.; Derwent, R., Jenkin, M., Saunders, S., Pilling, M., Simmonds, P., Passant, N., Dollard, G., Dumitrean, P., and Kent, A.: Photochemical ozone formation in North West Europe and its control, Atmos. Environ., 37(14), 1983–1991, 2003.; Derwent, R., Stevenson, D., Collins, W., and Johnson, C.: Intercontinental transport and the origins of the ozone observed at surface sites in Europe, Atmos. Environ., 38(13), 1891–1901, 2004.; Fischer, H., Lawrence, M., Gurk, C., Hoor, P., Lelieveld, J., Hegglin, M., Brunner, D., and Schiller, C.: Model simulations and aircraft measurements of vertical, seasonal and latitudinal O3 and CO distributions over Europe, Atmos. Chem. Phys., 6, 339–348, 2006.; IPCC: Climate change 2001: The Scientific Basis. Contribution of Working Group I to the Third Assessment Report of the Intergovernmental Panel on Climate Change, [Houghton, J.T., Y. Ding, D.J. Griggs, M. Noguer, P.J. van der Linden, X. Dai, K. Maskell, and C.A. Johnson (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, 881 pp., 2001.; Jonson, J., Simpson, D., Fagerli, H., and Solberg, S.: Can we explain the trends in European ozone levels?, Atmos. Chem. Phys., 6, 51–66, 2006.; Marenco, A., Gouget, H., Nédélec, P., and Pagès, J.-P.: Evidence of a long-term increase in tropospheric ozone from Pic du Midi data series. Consequences : Positive radiative forcing, J Geophys Res., 99(D8), 16 617–16 632, 1994.; Monks, P.: A review of the observations and origins of the spring maximum, Atmos. Environ., 34(21), 3545–3561, 2000.; Marenco, A., Thouret, V., Nédélec, P., Smit, H., Helten, M., Kley, D., Karcher, F., Simon, P., Law, K., Pyle, J., Poschmann, G., von Wrede, R., Hume, C., and Cook, T.: Measurement of ozone and water vapour by Airbus in-service aircraft: The MOZAIC airborne program, An overview, J. Geophys. Res., 103(D19), 25 631–25 642, 1998.; Naja, M., Akimoto, H., and Staehelin, J.: Ozone in background and photochemically aged air over central Europe: Anlysis of long-term ozonesonde data from Hohenpeissenberg and Payerne, J. Geophys. Res., 108(D2), 4063–4073, 2003.; Nédélec, P., Cammas, J., Thouret, V., Athier, G., Cousin, J., Legrand, C., Abonnel, C., Lecoeur, F., Cayez, G., and Marisy, C.: An improved infrared carbon monoxide analyser for routine measurements aboard commercial Airbus aircraft: technical validation and first scientific results of the MOZAIC III program, Atmos. Chem. Phys., 3, 1551–1564, 2003.; Oltmans, S., Lefohn, A., Harris, J., Galbally, I., Scheel, H., Bodeker, G., Brunke, E., Claude, H., Tarasick, D., Johnson, B., Simmonds, P., Shadwick, D., Anlauf, K., Schmidlin, F., Fujimoto, T., Akagi, K., Meyer, C., Nichol, S., Davies, J., Redondas, A., and Cuevas, E.: Long-term changes in tropospheric ozone, Atmos. Environ., 40, 3156–3173, 2006.; Ordó\~nez, C.: Trend analysis of ozone and evaluation of nitrogen dioxide satellite data in the troposphere over Europe, Ph.D. thesis, Swiss Federal Institute of Technology Zurich, 2006.; Ordó\~nez, C., Mathi


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